Sound reproducing and recording machine.



P. B. DEL'ANY.

SOUND REPRODUCING AND RECORDING MACHINE.

Patented Oct. 3, 1916.

APPLICATION FILED A UG.22| 1914.

vlggnfoz K PATRICK B. DELANY, OF SOUTH ORANGE, NEW

- SOUND BEPRODUCING AND RECORDING mm.

and has particular reference to improvements in the construction of the sound box and its attached mechanism.

One object of the invention is to mount I the vibrating arm which actuates the diaphragm so as to prevent the conduction or dissipation of the record vibrations through the mounting to the sound box casing or other parts of the machine.

Another object is to conduct the vibrations caused by the record to the diaphragmwithout loss or impairment of any kind, thereby overcoming harsh and metallic sounds and improving the quality of the" musical tones or vocal utterances, and the behavior of the apparatus in other respects, and still other objects will appear in the following description and claims.

Referring to the drawings: Figure lis a side elevation in section of my improved sound box and mechanism; Fig. 2 is a sectlon taken horizontally through the improved mounting for the vibrating arm; Fig. 3 is a face view of the mounting diaphragm; Figs. 4: and 5 are sectional views illustrating modifications of the mounting; and Fig. 6 is a sectional elevation of the stylus bar.

As shown in Fig. 1, a sound box 10 is provided in which is fitted a diaphragm 11. The vibrating arm 12 is attached to the diaphragm 11 by a connection 13, and at the lower end of the arm, a recording or reproducing'needle 15 is provided, located in socket 30 and fastened by screw 31.

A. fulcrum is provided for the arm 12 at about the point 16, This fulcrum is preferably constructed so that no local vibrations created at thispoint can make their way to the soundbox 10 or diaphragm 11, nor will any of these vibrations react upon the arm 12 to injure the tone or quality of the sound waves transmitted by the diaphragm. While there are many ways of accomplishing this object, in the particular construction shown the arm 12 isprovided with a crossarm 1 to each extremity of. which is attached a support 18;. The end of he e sup Specification of Letters Patent.

- Patented Get. 3, 19%..

Application filed August 22, 1e 14. Serial no. 858,059.

ports project into a chamber or cont ainer i9 1 20. The supports are also tied together by the flat bar or yoke 23. Coiiperating with the plate 20 and serving to balance the supports 18 is a spring 24 one end of which is attached to the plate. 20 or yoke 23 and the other end to the container wall 25. The object ofthe yoke 23 is to reinforce or stifienthe plate 20, but its use is not absolutely necessary. The mechanism thus described comprises a flexible mounting, or a'resilient, universal fulcrum mount, which is adapted to accommodate itself relatively to the dia: phragm' 11 and its connections therewith so that it adjusts itself to its natural andmost 'efiicient position. When thispositi'on has been assumed, means are provided to lock the mount'in place and provide a'permanent setting for the supports 18, 18 which determine the location of the fulcrum. This is done by filling the container 19"with a material made liquid by heat and which in cooling, sets intoa mass that prevents any further change in the position of the supports 18, and which is of a character that will, when. in a liquid condition, intimately adhere to all parts of the container, the

plate and supports with which it contacts, j

and when set, will check or prevent the transmission of vibrations therethrough. A suitable material for this purpose consists of one part by weight of Stockholm tar, one part" by weight of resin and -three parts bv weight of gutta-percha.

In Fig. 4 a modification of the mounting is shown in which the yoke 23 is dispensed with, and as in the construction described above, the plate 20 is not attached to the walls of the container but floats therein.

In Fig. 5 a modification is shown in which the plate 20 is floating and one set of the nuts 22, 22 is dispensed with; the plate 20 being held in its relative position by the spring 24.

The supports 1818 extend from arms 17, laterally disposed on the stylus arm, into the container thus insuring more perfect responsive action of the stylus arm tition as shown at 26.

I have discovered further that the rubbing which takes place between the butt end of the needle 15 and the base of the socket 30 is the cause of most of the discordant screeching in reproduction, especially in the lower tones when the vibrations of the needle are wide and powerful. It is advisable, however, that there be a fixed limit for the insertion of the needle, so that each needle is clamped in the socket at the same depth; I maintain such a limit and at the same time eliminate the objectionable rub bing by providing the bottom of the socket 30 with a suitable plug 32 of vibration insulation, such as rubber, leather, cork, or other suitable material, this plug preventing contact between the end of the needle and the bottom of the socket. The volume or pitch of the reproduction are in no way modified, but the rasping noises are eliminated.

I claim Y 1. In combination, a sound box and dia phragm, an actuating arm attached to the diaphragm,'a container, an arm supporting plate within the container, a plurality of supporting rods connecting the plate with the arm, means to adjust the plate within the container relatively to the diaphragm, and material inert to vibratidns adapted to hold the plate permanently within the container in a given position said material being cast inthe container and about the supports.

2. In combination, a sound box and diaphragm, an actuating arm attached to the diaphragm, a plurality of supports for the arm, a partitioned container adapted to receive the supports,.and a hardened or set plastic mass located in the container for securing the supports therein.

3. In combination, 'a sound box and diaphragm, an actuating arm attached to the diaphragm, supports for the arm, a

means connecting the plate and the con-v tainer, and a fusible materialfor filling the container and holding the plate therein.

5. In combination, a sound box and diaphragm, an actuating arm attached to the diaphragm and having lateral projections, supporting rods for the arm extending from the lateral projections and having an enlarged head plate, a container for the head plate, means for adjusting the head plate on the rods, and means comprising a material adapted to be fused and to harden on cooling to fix said plate in its adjusted position. 6. In combination, a sound box and diaphragm, a needle-actuating arm attached to the diaphragm, a plurality of supports for the arm, a container, and material inert to vibrations adapted to hold the supports permanently within the container in a given position which material is cast in the container about the supports.

In testimony whereof, I have hereunto subscribed my name.

ANNIE M. DELANY, A. 'P. Rrrnnonn. 

